Tire.



D. W. MOLEAN.

TIRE.

.-APIJUATQION FII-ED JULY 9, 1907.

. Patented Sept. 28, 1909.

TINTTD STATES PATEN T FTVTQ.

DONALD WILLIAM MCLEAN, OF MOUNT HUET', METHVEN, NEW ZEALAND.

To all whom it may concern:

Be it known that l', DoNMnn iViLLiAM Moliuxu, a subject. ot llis h/lajesty the Kino oi Great lritain and Ireland, residing at Mount .llutt, Methven, in the provincial district et Canterbury, in the Colony ot New Zealand, have vented certain new and use- 't'ul linproveincnts in Tires, of which the following a speciiication.

The invention relates to pneumatic tires for the wheels ot' vehicles and provides iinn proved ine-ans for protecting such tires from puncture and for reducing wear and tear.

According hereto I provide tire with a plurality ot protector blocks which one after the other come in contact with the ground during,I the rotation of the wheel to which they .are applied. Y

The whole series ot protector blocks are held upon the tires by means of grapples and hooks which connect them to chains one upon each side of the tire. A rectangular link chain also connects the entire series' of blocks around the periphery ott' the Wheel.

My invention is illustrated in the accoinpanying drawing wherein :n

Figure l lis a cross section of a tire fitted with my invention, Fig. 2 a corresponding plan. Fig. 3 a part transverse sectional. elevation on the line 3--2-3, Fig. il. Fig. 4L a pla-n of a bed plate, part of the apparatus. Fig. 5 is aside elevation, and Fig. G a sectional elevation on 6-6, Fig'. Fig. 7 is a side end perspective elevation of a grappler. Fig. S is an inverted plan oi.' a tread piece.

Referring first to Figs. l to 4; inclusive and Fig. 7 the protector block comprises a hed plate l and a tread piece The ,bed

plate l rests upon the circumference of the ineurnatic tire 2 and has a rectangular pro ]ection 3 corresponding with a projection L troml the tread piece 5. The projection 3 also has the projection 6 which closely 'ts a correspondingl recess 7 inthe projection A tic-lt 8 passes througlrthe tread piece 'i'.'hieiihas a counter sunklsole to rereivethe head of the holt) and th rough the projection B from the bed plate. The bed plate has a recess E) to receive the nut l0 of the bolt.

The tread piece has downwardly project# TIRE.

Specification ofrLetters Patent. Patentad Sept. 28, 1909. Application inea :anyv s, 1907.

Seria No. 382,894.

is held upon the tire hy grapples 14 and 15 one upon each side. i

The `grapple 14. has hooks 1G and 17 and grapple, l5 has similar hooks 18 and 19 (see Figs. 2 and 7 These hooks severally pass through holes 20, 2l 22 and 23 in the bed plate (see particularly Fig. 4,) 'and engage over round liars formed upon the ends of the plate.

lach grappler has a link at its lower end 24 and 25 respectively. The linlrf 24 bein engaged by hook 26 having an eye 27 an the link 25 being engaged loy hook 28 havinoP an eye 29.

.fi chain 30 passes through the eye 27 and through all the series of similar eyes used in eoinwction with sin'iilartread pieces upon that side oi the wheel and a chain 31 asses through the eye 29 and all the series ofl similar eyes upon that side of thel Wheel. The chain 30 is tightened by turning the tension how 32 which receives at one end screw 33 connected to one end of the chain and at the opposite end a screw 34 connectthe projection 3. The said link has a :hook' B9 which `receives* the next link 40 of .the chain upon one side and upon the opposite side receives the hook 41 formed upon the next link lof the chain upon that side (see Fig. 3). This is a well known form of square link sprocket chain.

To prevent the apparatus from Corning off in case the tire should become deli'ated I connect the chains Bil and 31 by leather thongs '-12 to the security bolts of the Wheel. One ot' these bolts 43 with the. connecting thong' is shown in Fig. 1.

The whole series of protectonblocks are placed in position before the tirer is inflated.

'the rubber. block and the screw bolt 4:9- passes through lthe bed plate .50 (which is .precisely similarv to -bed plate 1 referred to) and through thebed plateAf into a nut 51.

' Whatflf do clalm and-desire to secure by Letters Patent ofrthe United States is In a tire -protector of the class' described the combination with a pluralityof bed' plates having rectangular projections, tread-' piecesrecessed to fit the rectangular proj-eo..

the bedplates, andmeans for attac ing the bedplates to .a tire, of rectangular links ltting around the rectangular projections and forming a circumferential chain conforth.. y v In .,tes'timony'whereof I have signed my name to this specification inf'thei presence of two witnesses.

DONALD WILLIAM MCLEAN.l Witnesses.:

ALFRED HENRY HART, ARCHIBALD DoUoLAs COOK.

tions, means for securing the tread i'eces to 15 necting togethe1f the said bedplates, as set 20 

